By Sunday, the number of probable cases of the H1N1 ""swine"" flu had risen to 66 in Wisconsin.
Milwaukee County alone has 33 probable cases. The closest cases to Madison are in Rock and Jefferson Counties, which border Dane County.
Meanwhile, three of the probable cases that arose last week in the state were confirmed by the Centers for Disease Control over the weekend. These include two cases from Milwaukee County and one case in Adams County.
""These findings confirm the H1N1 virus is active in Wisconsin and people should continue to take precautions to protect themselves against the spread of influenza,"" State Health Officer Dr. Seth Foldy said in a statement.
The number of cases in the U.S. rose to 226 by Sunday in 30 states, but there still has been only one death in the country. The diseased reached 898 cases worldwide in 18 different countries.